diff --git a/README.md b/README.md
index ab607c5f206ce611b0cdb5f597ba8cdca2f84f0e..bcecfac4b0ebe26dd55b9464e650c577ba84e8c0 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,3 @@
-```
 # OpenCloudOS Toolkit
 - OpenCloudOS-tools is a useful toolkit, which allows:
         Querying and changing settings for OpenCloudOS, such as system information; upgrade system.
@@ -56,16 +55,15 @@ Let us use adding "oc-ops mem checkcost" command as an example.
    a soft link file.
 
 The contents of directories in a tree-like format in ops/mem/ are:
-ops/mem/
-├── checkcost
-│   ├── checkcost.sh
-│   ├── ops-help
-│   └── ops-run -> checkcost.sh
-└── ops-help
 
+    ops/mem/
+    ├── checkcost
+    │   ├── checkcost.sh
+    │   ├── ops-help
+    │   └── ops-run -> checkcost.sh
+    └── ops-help
 
 Develop language suggestion:
 We suggest using shell or phython to write OpenCloudOS Toolkit.
 Because they are interpreted language,
 they can run on different architectures (x86/arm64/mips/ppc/...) with out compile. 
-```